As others have stated performance is one of several factors for choosing an antenna type and its height.
I use three antenna options for 2m FM activations: 1) Diamond RH-770 ½-wave telescopic whip [mid height ~2.5m when standing, ~1.5m when sitting], 2) roll-up J-pole on 3m pole, 3) roll-up J-pole on 6m pole.
I’ve had 100’s of excellent reports using the RH-770 and it’s blindingly quick to deploy and to stow away. This is my default choice in very cold weather when doing a 2m-FM-only work-through-the-chasers-and-go activation. I won’t use it in high winds as it stresses the HT’s SMA connector. The only disadvantage is when it’s raining or in a thick Scottish mist [same thing really!], moisture drips down the whip and onto my FT1D (yes, I know it’s IPX5 rated but it alarms me anyway).
I use the J-pole on a 3m pole, not so much for Dx, but when I want to hunker down in the heather or sit on the leeward side of some rocks to avoid adverse weather whilst the antenna is out in the open.
I use the 6m pole for the J-pole only when I’m taking that pole anyway for my HF inverted v or EFHW antennas.
Local chasers (let’s say less than ~50km) notice little or no difference between the whip and the J-pole. Further afield the antenna height can make a big difference. For example, Mark @M0NOM and I did a joint activation of Place Fell G/LD-027 last summer. Mark used a Slim Jim from the top of a 10m pole whilst I stood using my RH-770. We took it in turns to work the chasers using our 5W 2m FM HTs. Mark had no problem working the most Dx stations whilst I could barely hear some of them or they hear me.