So you are in agreement that their offensive levels are similar? You don't seem to want to acknowledge that for some reason.
And, as you like to frame it, what did Howe's domination "everywhere" do for his team's success? Four cups, one of which he contributed little to, in 24 years is hardly anything to write home about. Crosby is the biggest winner of his era when you factor in his Cups and international wins and individual contribution to those championships.
I have no issue with Howe's all around game being held in high regard, Crosby's all around game is also certainly impressive in comparison to the Top 10 to 15 players. What about his leadership? Beliveau seems to be given a few extra points for his leadership, why not Crosby in comparison to Howe?
Dude, I'm about the biggest Crosby fan in the world (ok, a stretch, but he's easily my favorite player of all time). Hockey could not have a better role model or ambassador for the game today. He's lived up the insane hype and seemingly is still playing at an all time level post 30.
With that being said, no I don't think Crosby and Howe are similar offensively. I think Howe is a full notch above Sid. Howe simply dominated people more than Sid has. By age 28 Howe had 5 scoring titles, 4 goal scoring titles, 3 assist titles and that was a time period that overlapped with Beliveau, Richard, Harvey, Horton, Gadsby, etc, etc. He faced stiffer competition for supremacy.
Goals per game in the league between the early to late 50's were between 2.4 and 2.9. When Crosby broke into the league it was just over 3.
There is no way to get Sid on or near the level of Howe as a regular season player. None.
Now, if you want to talk playoffs, then there is at least a debate to be had and if we're talking potential, then sure Sid could pass Howe in that department. I honestly think a 4th Cup and 3rd Smythe (especially if it's more like 2008, 2009 or 2017) would put him into the top 5 postseason players ever.