I have to agree with the last post. You definitely need to install the trainer QR. Even if yours is similar in size, you can get a little wobble in the back wheel which can mess up your back hub and put undue stress on the chainstay. Plus, if anything does happen (i.e. you come out of the trainer when you’re cranking at 20mph) and you’re not using the QR from Cycle ops, your warranty won’t cover the damage to the trainer and there’s no chance the company will cover the damage to you.
Plus if you really like your old QR and you want to ride with that one on the road, it only takes 30 seconds to switch it out.