As for that move, I've seen it plenty, ironically (because of the op) that's more of a Jagr move. In the day Jagr was famous for deking from a stand still. Most recently I've seen Kadri do it on occasion.
Yup, this is also reminiscent of Jagr, in fact I'd argue more so than Lemieux, Jagr was more prone to slow a game down along the boards like this. Not many instances stick out to me of Lemieux emulating this kind of thing outside of that one I guess fairly stand out goal where he does something similar in tight against the Bruins.
In fact I don't really see all that much comparison stylistically between Lemieux and Laine, I mean what is the comparison people are hung up on? His shot? Mario never really had the hardest of shots. Sure he'd wind up once and a while and blow one by a goalie but that was more due to the time period of the stand up goalie being so much more vulnerable to simple slap shots than today's goalies. When I picture Lemieux I don't really think of an overpowering shot like Laine or Ovechkin have, Lemieux's bread and butter was his forehand backhand deke. So maybe it's Laine's "hands" then? Well yeah Lemieux was very skilled in that department, but I'd argue a Datsyuk is the more prototypical handsy player. Kane currently is probably the most flashy hands wise. So then if you're stuck on the skilled big man angle you might stretch the comparison, but I grew up on the 90s Pens, so I'm pretty familiar with their styles, and for me I've never thought of Lemieux while watching Laine, admittedly a rather small sample size.
Malkin is one who reminds me of Lemieux's style as others have made mention too, specifically his skating and when he attempts to deke through a defense towards the net, it's a very physical style like Mario when he'd be dragging defensemen behind him. Ovechkin funny enough with certain mannerisms during celebrations have at times brought Lemieux to mind as well, when Mario was younger with the beard.
For me when I think of stylistic comparisons between players, I always picture a silhouette of the player and whether or not someone else reminds me of it. In this sense for instance McDavid's skating and deking style is very reminiscent of Crosby to me, someone I'm again very familiar with. So in that sense I don't really see the Laine and Lemieux comparisons, but to each their own.