whichever is newer i forget which one is newer but it has a less chance of getting rrod than the other slim. ive done some research awhile back and some slims tend to get pretty hot.

Corona is the newest. I have a Trinity and it runs fine, I leave it on all day every day. (not literally but 5+ hours) and it's working like a champ.

Since Corona's are newer it means there is a better chance it has a better history. Since Trinity's aren't made any more there is a bigger chance someone used it a lot. Which means its average heat will be higher.

Not really even something to worry about, there both forever lasting consoles, maybe not literally but we're not talking about Xenon's.

I think you should buy Trinity RGH. The dude who I bought my RGH console from said that the Trinity models are a little bit stable and better than Corona to Reset Glitch Hack. So yeah I followed his advice and bought the Trinity RGH. It has worked wonderfully and even after +6 hours of playing it runs perfectly! But I prefer you to raise a little bit the fan speed cause when the fans are running on auto, the CPU is getting a little bit to warm. I'm sure the both RGHs are good but my choice is Trinity.