Blaze always rides a chopper. Ketch always rides a super bike.
When they bought Blaze back they kinda just gave him some Ketch stuff, so they threw on the leather and gave him the chain, but they have always stuck to their own bikes.
So they could do a modern interpretation of Blaze but giving us everything we like about Ketch, like in the Clayton Crain art.
As you can see in this legendary Silvestri art, they both kind of end up looking the same, with Blaze now kinda having Ketchs look but still kinda in the jumpsuit, and them now tweaking Ketch to differentiate them.
I also really liked Danny Ketchs look in the 2007 series where they gave him the longer trench coat and the hooks on the chain.
I just know whatever they do i NEED a 1/4 Ghost Rider.