v8-x4

Hey there fellow vapers, Got myself the TFV8 about 2-months ago, and it's been going really well. I've managed to try out the V8-T8, V8-T6, and V8-Q4 coils. But haven't had the chance to try the V8-T10 & V8-X4 yet. Does anyone have any experience with these coils? Pros and cons? For those...