Vero is easier then HH at 7 months. HH in the summer is the closest thing to impossible I've ever seen. Yes, there are always a few exceptions, but they are few and far between. Vero is easier in my opinion.
We own at BWV and have done Vero and HH in summer. My experience booking each (which was based on signficant prior research on DIS).
HH: very tough to get between late May and mid August if you don't own there (very little availability of anything at the 7 month window).
That changes somehwat after mid August; large sunbelt family element disappears because their school systems are all opening. We got a 1BR (the most limited category at HH) at 7 months for a 9 day ressie that started on 8/17. Resort demographic then changes, is very Northeastern U.S. with a heavy U.K. sprinkling (southern U.S. accents which dominate earlier in the summer become nonexistent).
Vero: not as tough as HH, but has a "sliding scale" of availaibility that is toughest in spring and begins to ease up somewhat by mid July. 7 month window availaibility simultaneously improves, to the point where by early August you can get pretty much any villa at 7 months.
That is partly due to the unjustifed obsession with the Inn rooms that many many DVCers have, based on an erroneous assumption that the inn rooms are the only way to get a good ocean view at Vero (which is
wrong; the front facing top floor villas in the four villa builldiings are much nicer and have similar views).
Note that the guest demographic at Vero in summer is different than most other DVC resorts. Huge numbers of non members stay there (particularly in the Inn), most of whom are appending a short Vero stay in front or back of a WDW vacation. That makes for a lot of daily turnover at the resort and a perpetually jammed front desk (if you need their help, go early in the morning or late at night!)