Hi DaveS,
Of the three RS displays specified, that all use the same S6B0724 controller chip, I have only used the first one listed RS 627-1824.
If you see the tech data sheet on the RS site they do show them to be identical apart from the display colours and backlight.
They all have pins spaced at 0.05", which as you can see from the pic on page 3, can, with care, be hand soldered to your own pcb.
The display I used, the RS 627-1824 has been discontinued but there are other new units now stocked that can be used instead, providing they are 128 x 64 and use either of the controllers S6B0724 or ST7576R.
The one you are looking at is still available.
The EADog displays are so much easier to use with their 0.1" pin spacing but the problem is they are only available from a few outlets in the EU - and not that cheap, there are many other displays around that use a FDC type lead that need a matching smd connector which are not always easy to buy or fit, hence my use of these displays.
The only other comment is that is you have to do a voltage drop from 5v to 3v3 for the displays do not use the 74AC08 as shown in the manuals schematic - many better options listed in this forum.