IOTA is for machine to machine transactions, XRB is for microtransactions. Separate use cases.
Still IOTA has a ton of issues and I'm not sure those will ever be resolved. Also the community sucks, look at the reddit thread in the IOTA sub where that guy lost $30k. At least his post wasn't deleted, they're censoring the hell out of it.
No, they are not censoring. Stop spreading fud.
IOTA community, especially in Slack, is great and very supportive. However, we are attacked by a lot of fud the last time, due to the rise in market share. People say IOTA fake Microsoft collaborations, but even Microsoft writes it on their webpages etc. It is annoying as hell.
I am writing this, because RaiBlocks will have the same issues once it reaches 1bn, then 2bn.. people wont understand the concept, they will question the technology, they will spread fud. Do not be a part of it when it comes to IOTA if you wish not to hear the same lies when RaiBlocks moons.