I’ve gone through most in the collections and some do share same or similar effects, but it’s mainly that single stream beam from the back just colours and smoke patterns change, the ones I’m talking about may have been re-used on ones that you can’t see from collections so I can’t say 100% But the ones are - undefeated ( on character screen you can see blossoms flying around the character, when boost is activated it has this multiple red beams behind you with blossoms getting blasted around ) now that’s an exotic, plus adds a decorative thing to the character screen. -Dinas Emrys ( now they have used this boost again but it has differences, this one when boosted you kinda see a shockwave happen, plus while idle it has this super neat looking red sparkle around the engine bay, also within the smoke you see what I think is earth being dug up from the ground as you boost by ) -vanishing point ( this one is beautiful. While idle or on inspection this has a pulsating design on the engine bay, it has feathers in it as it’s supposed to resemble a Phoenix, plus the tail is always fluttering, then when you boost, the side wings burst out in this wonderful light, and the tail grows bigger and brighter and it really looks like a Phoenix from the ashes flying around) They do have more to inspect that I didn’t list that do have cool effects, but I don’t want to write a book haha. But I hope that answers your question