The comply tips would loose its...suppleness after 3 weeks. After that they were stiffer and would become harder to mold and spring back to its original shape faster, that made them harder to insert; mind you, I used the professional tips, the ones that inserted deeper, I never liked "regular" ones. Also, the wax would just completely disintegrate it after a month and a half, and that was even with regular cleaning since it would just start to crumble and the dust that the comply tips turn into would crawl into my ear canal and become a huge black clog of wax. Last year I had my ears cleaned and they took out like a 1.5 cm long and 4 mm thick clog of wax out of both of my ears, mostly made of comply dust. I found the Westone True-Fit red tips to be superior on my Shure IEM over the comply ones, they created a better seal, didn't dull the highs as much, are coated with a layer of...something that makes them more resistant to wax and were overall sturdier, bit firmer that comply but they would losen up with use. I could use Westone tips for 4 to 6 months at a time with proper care, I would replace them after they didn't isolate as well.
But being as good as they were, I eventually also got bored of replacing Westone tips, so I started hybridizing my own tips. I took Westone red Star Tips and wrapped them around a trimmed down and de-cored Westone True-Fit red tip. I got the seal of silicone with deep insertion and nice highs, with the isolation and bass of foam tips, a winner combination for me, and they would also last forever, I did that once and went on for 8 months with a single pair of tips. I only dropped them after I got the Vega.
Since I'm still testing out ear tips on the Vega, I'm rolling between the Vega medium silicone/ De-cored Shure medium olives and Vega small silicone/De-cored Campfire Marshmallow small tips. What's curious about the Marshmallow tips, it's that the core it's not glued on as well as on Shure, Westone or Comply tips, so the core came off quite easily without any foam stuck on them, so the process is kind of reversible on the Marshmallow tips.
And that's that, I hope I was of any help. I'm still testing things with the fit of the Vega. But I'm sure that I'm going to nail down the fit of this thing.