In bridge, are "sequences" more valuable than non-sequences of similar point count?
Yes, it is possible, but it might vary when you are considering the offensive/defensive potential.

Consider your example KQJxx vs AQxxx

Suppose this was the trump suit and say partner has Txx.

With KQJxx, you likely have only one loser. But with AQxxx it is quite possible that you will have 2 losers.

offensively (i.e if that suit is trumps) KQJxx can probably said to be "better" than AQxxx.

Defensively (i.e when you are defending and this is a side suit), AQxxx tends to be more valuable. This is worth an almost sure trick, and is a reasonable chance that you can make 2 tricks.

With KQJxx, you might make one trick, but the second one might be unlikely.

So defensively, AQxxx is "better" than KQJxx.

Of course, I am yet to come across a hand where this difference seems relevant (perhaps we can construct an artificial hand where there is a choice of trump between two suits).