At least for me, Rider is definitely faster than Visual Studio, both in startup time (easily human-measurable) and operation (also easily human measurable, by lack of intermittent hangups and laptop fans constantly whining).

I'd also say that Rider is more stable - I've only ever seen issues with preview versions; the production versions are solid, which can't be said for Visual Studio.

I was a Visual Studio fanboi for many years before discovering Rider, so wouldn't be easily swayed - please, try it and see for yourself!