My Red Backlash has the same coverstock as the Cherry Vibe but a slightly rough finish (2000 vs the Cherry's 4000 grit + polish) which kind of balances out the slightly weaker core. That said, I suspect the Midnight goes "slightly" longer with "slightly" more backend. I think the Grape Vibe would be a more distinctive step up from the Cherry. Most people feel the Grape handles closer to true medium oil, with a pretty strong backend due to the coverstock, a pearlized version of the Blue Vibe.
You can always take a Vibe down to 1500 or 2000 grit and add a light dose of polish to make it handle more oil and hook slightly more, getting a better read of the midlane. or even just take it to 4000 grit and leave it at s matte finish.
"None are so blind as those who will not see."
