We never have people with 1250s have engine trouble at our track
Where's your track?
Why did so many brand new 1250's blow at the Million last year?
At my track, which is obviously inferior because it is dirt, there have been multiple 1250 issues, with engines being sent back repeatedly. Multiple 1200 issues also, but thay have all come from the same builder (not me).
Just buy what you want to buy. If having a few 1250's in your trailer makes you more comfortable, then do it.
If you prefer to work on your own stuff, go with the 1200.
Neither is junk, otherwise they both wouldnt be out there winning races.