Kitbashing Baal Predator & Gladiator

I've gotten back into the hobby after 16 years and building up a rather formidable force between all the boxes lately (and FB marketplace god damn I got a Librarian in Termi armor for $10!!).

I have both a Baal and Regular Predator in their original boxes saved from when I was a kid back in 2012. I plan to build the Baal Pred with the flamestorm cannon and then purchase a 3D printed flamestorm to turn the regular into a second Baal.

I am wondering...do the regular predators and gladiators have the same weapons/turrets and could I use the regular predator weapons I'm not using and put them onto the Impulsor I have (from the previous combat patrol) to make a gladiator (originally planned to also buy 3D printed gladiator weapons for this.

Any and all advice is welcome, just please be respectful! Thank you and strength in Sanguinius' name #itshouldhavebeenhim