If you want a comparison of the '46' vs the '48':
Many ADKs require the 'out' and the 'up'. In other words, there is a long walk just to get to the real mountain. This is not so much the case in the Whites.
Many of the ADKs peaks have herd paths, where the condition of the trail ranges from great to horrible (like Cliff!). Most of the 48 have groomed trails, not that they are all a piece of cake. I would rate the Whites as having better trails. This is not blaming anyone, it's just that the ADKs seem to be muddier, no matter when you go. Places like Bradley Pond and the Sewards are just ALWAYS muddy! As for access, most of the ADK trailheads can be accessed by a normal maintained road. Mostly true for the Whites as well. In Winter, some become more difficult to access. Fees are charged in some places to park in both ranges.
Both have their moments for steep trails.
Both have summits you can get to without hiking!
Both have long death marches, Allen, Owl's Head, Bonds, Santanoni's, etc. etc. Both have short and sweet hikes, like Hale, Cascade, Jackson, Phelps.
Both have places where you can string multiple peaks together if that is your thing.
Both can have severe weather above tree line and astounding views.
The tree line in the ADKs is about 4900'. Not sure about the Whites.
Crowds can range from nil to hundreds per day on both sets of peaks.
I really don't see much wildlife in the ADKs, and not a whole lot more in the Whites. You are more likely to see Moose in the Whites, and bears in the ADKs, statistically, anyway.
I believe the Whites average about 100' higher, but I do not know about the actual ascent required per peak.
Of course, there are a lot of other mountains in both ranges. I am not familiar with the lower Whites, but the lower ADKs are frequently bushwhacks. Some of the lower ADKs have trails, such as the peaks with fire towers on them.
FWIW, I am 115-er #487