The Yaesu 230 clearly states that TX is 25KHz channels only, selecting 8.33 spacing disables Tx. The 750 Manual Spec says 25/8.33 but doesn't say whether that includes TX and then only describes selection of 25KHz channels in the operation section, and not how to select 8.33 mode.
I would stick with the ICOM products, which do have 8.33 TX and RX.