Blade v7 18x20 and blade pro 18x20 are two completely different racquets. I used the v7 for a while and still my most trusted stick in my bag. I used it in stock form then modified it to my current setup 27.25 inches, 336 grams with everything, 32.8 cm bal. Played the best with that specs for me.
Blade pro in stock form swings very heavy and almost unplayable unless you're hitting with someone that hits really slow. Feels really good though. Flex feels around 63 is my guess. I ended up matching the specs to my Blade v7. Been using it as my main stick. Swing weight feels a touch higher, more feel and power than v7. Really liking the setup. Really liking the RF97 too.