The initial rolling into a right turn might be more comfy because you are moving the stick closer to your shoulder rather than away from it.The initial rolling left might be a little more uncomfortable because you are extending rather than retracting your arm,once established in the turn it shouldnt really make much difference because the stick may well be centred or even 'holding off' the bank angle with slight opposite stick.
In a side by side glider - direction of turn can feel vastly different because you are either at the 'bottom' or 'top' or inside /outside.
But we all do have personal preferences about most things !!
Actually flying the glider eventually becomes second nature/instinctive and whether you end up turning L or R may well depend on who is above you in a thermal or where you think the best lift is and how to 'centre' into it.