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A Butterfly of Differences – The history of rare diseases and their demographics — 18 websites ranked by shared content topics, category and on-page relevance.

Each result shows its full tech stack, contacts and AI-policy — not just a name · Browse all sites in Brain And Nervous System Disorders →

Domain	Match	Title	Country/Lang	Category	AI files	Contact	AI-protection
corare.com ↗	66 match 1 shared topics	CoRare - Rare Disease Community Platform	en	brain-and-nervous-system-disorders	robotsllmsaihumans	emailphone	none
onlinemediagroupinc.com ↗	66 match 1 shared topics	Onlinemediagroupinc • new medicine diseases	en	brain-and-nervous-system-disorders WordPress	robotsllmsaihumans	emailphone	none
different-strokes-portsmouth.org.uk ↗	65 match 1 shared topics	For Stroke Survivors, carers and relatives in the Portsmouth area - Different Strokes Portsmouth	United Kingdom en	brain-and-nervous-system-disorders	robotsllmsaihumans	emailphone	none
lupusmariposa.com ↗	65 match 1 shared topics	Autoimmune Disease Awareness \| Lupus Mariposa	en	brain-and-nervous-system-disorders WordPress WooCommerce	robotsllmsaihumans	emailphone	none
mctdfoundation.org ↗	64 match 1 shared topics	Mixed Connective Tissue Disease - MCTDfoundation.org	en	brain-and-nervous-system-disorders WordPress	robotsllmsaihumans	emailphone	none
edslater.co.uk ↗	64 match 1 shared topics	4Ed - Supporting Families Affected by Motor Neurone Disease (MND)	United Kingdom en	brain-and-nervous-system-disorders Shopify	robots llmsaihumans	emailphone	none
theuniquesamantha.com ↗	64 match 1 shared topics	the unique samantha – the making of me	en	brain-and-nervous-system-disorders WordPress	robotsllmsaihumans	emailphone	none
onetinies.com ↗	64 match 1 shared topics	Hope for Noah \| Fighting Niemann-Pick Disease — Help Fund Care & Therapies	en	brain-and-nervous-system-disorders	robotsllmsaihumans	emailphone	none
iedat-project.eu ↗	64 match 1 shared topics	Ataxia Telangiectasia; rare genetic disease; IEDAT; Erydel; pivotal phase III study; H2020; clinical study	European Union en	brain-and-nervous-system-disorders	robotsllmsaihumans	emailphone	none
ern-euro-nmd.eu ↗	64 match 1 shared topics	ERN EURO-NMD - European Reference Network	European Union en	brain-and-nervous-system-disorders WordPress	robotsllmsaihumans	emailphone	none
ticsandtourettes.com ↗	64 match 1 shared topics	Tics and Tourette's Book - Breakthrough Discoveries in Natural Treatments	en	brain-and-nervous-system-disorders	robotsllmsaihumans	emailphone	partial · 8
mdsicon2027.com ↗	63 match 1 shared topics	MDSICON 2027 Chennai \| 11th National Conference of the Movement Disorders Society of India \| MDSICON 2027	United States~ en	brain-and-nervous-system-disorders	robots llmsaihumans	emailphone	none
mcfinnlovere.com ↗	63 match 1 shared topics	McFinn Lovere - The Tale of an ALS Reversal	en	brain-and-nervous-system-disorders	robotsllmsaihumans	emailphone	none
fibrowisewomen.com ↗	63 match 1 shared topics	Fibromyalgia insights – Ireland, the UK, and Europe.	en	brain-and-nervous-system-disorders WordPress	robotsllmsaihumans	emailphone	none
addisonsdisease.org.uk ↗	63 match 1 shared topics	Addison's Disease Self-Help Group	United Kingdom en	brain-and-nervous-system-disorders Shopify	robotsllmsaihumans	emailphone	none
thrivewithtanita.com ↗	63 match 1 shared topics	"We Exist" by Tanita Allen: A Powerful Autobiography and Memoir	en	brain-and-nervous-system-disorders WordPress WooCommerce	robotsllmsaihumans	emailphone	none
dontforgetme.org.uk ↗	63 match 1 shared topics	Don’t Forget Me – Finding the Me in Memory	United Kingdom en	brain-and-nervous-system-disorders WordPress	robotsllmsaihumans	emailphone	none
fernandeslab.com ↗	63 match 1 shared topics	The Fernandes Lab \| Université de Sherbrooke \| Alzheimer's disease	en	brain-and-nervous-system-disorders Wix	robots llmsaihumans	emailphone	none

How the match score works

Each match is a 0–100 similarity score — the higher it is, the more two sites resemble one another. It’s computed automatically from our own crawl data (never from what a site says about itself) by combining several independent signals, so a high score means several of them point the same way:

shared topics how many of the same fine‑grained content topics (IAB sub‑categories) both sites cover — the main signal.
same category whether they sit in the same business / industry category.
content & title how closely their titles and page descriptions line up in wording and meaning.

No single signal decides the result — they’re blended together. Treat the score as a way to rank candidates rather than an absolute percentage; the chips on each result show which signals contributed.