I use both types and the difference isn't as dramatic as they sell it to you. The regular spray you've known forever is still the most versatile because it distributes better, especially if you want to cover more body area in one go. Roll-ons and sticks are more concentrated and targeted, so they force you to be more selective about where you apply them, like wrists, neck, behind the ears. As for longevity, honestly it depends more on the quality of the perfume itself than on the format.
The marketing thing is real. Some roll-ons and sticks last longer because the concentration is higher or because you apply less without realizing it, but it's not a hard rule. What you do notice is that the product lasts longer in the bottle simply because you use less per application, not because it's more efficient. If your current spray is working fine for you, the truth is you don't need to switch just for the sake of it. Better spend that money on better quality perfume if what you're worried about is longevity.
The only place where sticks and roll-ons win is in portability and that they won't stain anything if you carry them in your bag or backpack. If you travel a lot or need touch-ups during the day, then it's worth having one. But if switching to new formats seems like a hassle, don't stress about it and stick with what you're already using.