I’ve done both. I prefer even weave to aida, and I like stitching over 2. I don’t think it looks like aida at the end. IMO it looks like tapestry. If you stitch over 1, it’ll be very hard to do half stitches (if there are any in your pattern). Over 1 looks like petit point to me, so I guess each has their place depending on what you’re going for.