Is formula bad for reaching?

I'm starting out sailing big sails on an older 90cm formula board. Having great time, but considering buying a newer used 100cm formula board so I can plane even earlier.

Have heard that the newer formula boards are uncomfortable on a reach. Is that true even when using a smaller fin? I'm sailing recreationally and am focused on planing as soon as possible and not racing.

I find that even with 12.0, the 90cm board planes earliest while on a reach, and it's still quite comfortable. Of course, when overpowered, I turn sharply up or down wind to bleed off power.

So, would a newer 100cm formula board be similarly comfortable on reach when lightly powered and when using a less powerful fin??

Or is the geometry of the board such that reaching is just not comfortable under any circumstances.