Engelin does have a very recognizable style. Lots of E-string action that sounds slightly nu-metal adjacent, and somehow it stands out in the genre.
He does have a style for sure, and it's a weird amalgamation of classic rock, modern melodeath and everything inbetween. But as recognizable as it is, it's not unique nor interesting enough. That's probably the biggest downside of DotL for me, how little of Jesper is there. I think I can safely say that we all expected the signature golden era IF melodies and leads and there was very little of that.
STYE sounds like fast melodeath to me when I think of riffing in songs like In Search for I, Superhero of the Computer rage, Dead alone, My Sweet Shadow
When you look at chorus of In Search of I with those piercing keyboards, or when you look at those overlapping guitar notes in the intro of Dead Alone, or the obvious main theme part of MSS - for me those moments with their specific atmosphere are modern melodeath being excessively flirtatious with alternative rock/metal.
Now, I don't necessarily mean that's a bad thing because I actually like those songs a lot and they are in the half of STYE that I enjoy (I know most people here dislike them heavily, sans MSS). Its a very long winded way to say that those songs are not carried by intense guitar parts, but by electronics/keyboards and long open guitar chords in the background that support them. Pretty much antithesis of melodeath riffing.
STYE lacks great guitar parts. Sure there are some fast paced gothenburg pedal riffs but they seem subpar and very placeholder. Now, it somehow manages to be a fun listen in spite of that.
When we talk of Dimension Zero I see them as a band that's literally fusion of Hypocrisy and Slayer, and while they go into the caveman thrashy mood a bit too much for my liking I sure can appreciate its impoliteness nowadays given the current state of this genre.