Not quite the same, no. A stick burner will always turn out better IMO.
To what degree, however, is subjective. Ever since I got my LSG IV, I haven't fired up the stick burner once. It turns out really good product and the ease of use is well worth the conversion to me.
It would take a really experienced authority on your specific Q to notice. Personally if I was weighing options before purchase, I would say food quality is not a factor when comparing the insulated vertical vs a stick burner. That's what I would tell myself if I had a chance to talk to my future self pre-purchase...and then I'd tell myself to buy it immediately because it will make BBQ life much better.
On a side note, I would also tell myself to invest in lots of roasting pans or alternate methods so that you can lay your proteins on that vs directly on the grill grates. The pans will keep the smoker cleaner for longer and significantly reduce mess as well as making it super easy to transport the protein in and out of the smoker more easily. This goes for pretty much any smoker I suppose, but just wanted to mention it in case a new smoker break-in is coming soon!