I have a R5 5* Sparks and a R2 Stealthy. I almost never use Sparks anymore but use Stealthy all the time. Not to say anything bad about Sparks, he's still useful but seems like the Meta makes Stealthy more useful. That said I'd go with 5* more often than 4* if it makes sense. If that was a 5* Sparks and 4* Stealthy I'd say go with Sparks, as it turns out the 5* is my preferred champ. Good luck.
They are both amazing champs with different utility and overall very good damage output (maybe starky wins here). Would r5 both of them, but since you only have stealthy as a 5s, go with him.
Comments
Post collector, stealth suit is better. Depends on what you need done really
Utility- Stealth Spiderman
Now if was an awakened 5* Stark . ...
That would be a discussion
Would r5 both of them, but since you only have stealthy as a 5s, go with him.