I take Drysdale over Sanderson too, but you should certainly consider slowing with the "Sanderson is overhyped". If the Devils pick at #7 and Sanderson is on the board but Drysdale is not, Sanderson will very likely be the Devils pick, and deservedly so. This is certainly a possible scenario.
Defensively, Sanderson is the most complete rearguard to come out of the draft in several years. Offensively, he is also extremely effective, if not dynamic. He is one of the top skating defensemen in the 2020 draft, and possesses the highest hockey IQ of any D in the draft. He is one of the younger players in the draft, which is amazing when you watch the maturity and composure with which he plays.
I'm just going to throw this in here -- a ranking of the top 5 defenseman in the draft on offensive and defensive levels. Of course, this is conjecture based on my own observation, but it's worth noting.
OFFENSIVE
1 Drysdale
2 Poirier
3 Sanderson
4 Cormier
5 Andrae
DEFENSIVE
1 Sanderson
2 Schneider
3 O'Rourke
4 Faber
5 Guhle
There's only one name on both of these lists. Though I would describe Drysdale as strong defensively and Andrae as good, Poirier and Cormier are not. The next name on that list would probably be Villeneuve, who is also not a strong defensive guy.
On the defensive side, I'd say all 5 of those names have solid offensive upside as 2PP guys at the NHL level, especially Guhle and O'Rourke.