I can't prove it. All I can say is that a lot of people certainly don't hear it. That doesn't sound like a "big" difference. It sounds like a difference that is too small to care about, if the difference is there at all. Anecdotal evidence doesn't support this huge difference. If I had a product that was so much better than Pro Tools in terms of sound, why in the world would I not stand on a mountain top and sing it's praises on high. LOL There are always plenty of people who say sequencer A sounds better than sequencer B. The voices noticeably missing from this proclamation are those of the very people who stand to gain most from it, the companies that make this stuff. They seem to be unaware of how much better their product sounds than everything else.
Record doesn't attempt to provide the kinds of tools that Logic does so maybe it has less reason for a crash. And of course, upgrading to any new version of Mac OS is a recipe for problems. Every version of Mac OS since the first OS X breaks plenty from the one before. Any time you upgrade you will have a certain number of plugins that will be incompatible as well as hardware that no longer works. Snow Leopard was no exception.
Don't say that too loud or you'll be arguing wars on both borders. LOL I'm sure there are plenty who will flat out refuse to believe that.
That really sounds like a huge difference, but again, anecdotal evidence doesn't support it. In order to blow a Pro Tools mix out of the water there must be some glaring problems with Pro Tools mixes. Or, Record would have to be a magical creation with faerie dust sprinkled on it. LOL. Seriously, if you say there's a difference, I'm actually inclined to believe you. I mean, your opinion has to carry more weight than mine. But reality just doesn't support the size of the difference. You say it may "blow Pro Tools mix out of the water". That sounds like a massive difference. I'm thinking it may be more like a match up between Carl Lewis and Husein Bolt. One guy is a skinny hair faster than the other...on some days.