I recently ordered 5x G65SC02P-4 processors from UT-Source. They arrived a while back and I finally got around to testing one today. They appear to be genuine with no dodgy date codes (8817 is reasonable) or remarking. Physically they have the same pin out as the 6502 and 65802.
My three chip board detects them as a 65C02 as it executes JMP ($FFFF) in six cycles and correctly reads from $FFFF/$0000 but a simple test program ..
Code:
.d c000 c005
C000 A9 61 LDA #$61
C002 07 1A RMB $1A
C004 00 FF BRK #$FF
.g c000
PC=C004 A=62 X=14 Y=00 P=..11...C SP=FF
.. shows that the RMB ($07) is treated as a NOP and INC A ($1A) is modifying A ($61->$62). I can't test the speed characteristics.
I may extend the PIC firmware to detect the 65SC02 and boot into device specific firmware (as it does for the 6502, 65C02 and 65802) but it needs a bigger PIC (currently 64K flash) as I reserved 16K for each device's boot image (12K Free + 4K Monitor + Utils). I could detect it in the 65C02 boot ROM but I think it would be better to remove the unsupported intructions from the disassembler and trace command.
Some PICs with 128K flash have been ordered (18F47K40, 18F47K42).