In my experience:
Freeriders are pretty flexy after a bit of use. Tend to work well though. Normal fit.
Freerider Contact. Stupid sole with no grip – also the sole falls off in super fast time. Avoid.
Freerider Pro. Probably the best shoe in the range IMO. Light, dries quick, well vented so less sweaty feet. Grip is good, sole is also stitched on, so durable too.
Impact VXi. I’ve run these for years. Great shoe & mega grippy. Sole is fragile though so get some gorilla glue & get used to sticking them back together. I’ve got some 3 year old ones which I have as spares, the sole is ravaged yet they are significantly more grippy still than any other brand of shoes on the market.
They would still be my number one choice if the sole lasted longer without me having to glue them back together.
Impact Sam Hill – Probably great, but just remind me of the old Impacts – they big, clumpy & heavy.