OK, my "observing" skills weren't so good before, but I am noticing some differences between the LOT8s for SD and HD (thus, the IS and IS2). I just recorded the IS2 from :48 and IS from :08, but it was with my phone, so the quality is not very good. Granted, these are at different points after the hour, so unless flavors have returned, there are some noticeable differences. Yes, this is being really picky, but I find these differences interesting.
On the IS (SD), there are those jokes. On the IS2 (HD), there are not.
On the IS, there is NO weather bulletin. On the IS2, there is.
On the IS, there is an ad crawl. On the IS2, there is not.
On the IS, there are no narrations. On the IS2, there are.
Different radar maps:
On the IS, the radar was the regional then the local (even with no precip). On the IS2, there was only one radar that was zoomed way out to show the entire state of Oklahoma.
Different "Today" forecast:
On the IS, the Today with text was shown, then the hourly forecast. On the IS2, there was no hourly forecast. The Today with text, then Tonight with text was shown.
I don't know if these differences were intentional, or if they didn't expect anyone to scrutinize the differences this closely.