Stamp's striking is as good as Xiong JingNan and better than Angela Lee, and while Angela's grappling is better than Stamp's, Stamp's grappling is slightly better than Xiong.
Both Stamp & Xiong (together with up-and-coming Jap girl fighters Ayaka Miura & Itsuki Hirata, both impressively well-balanced in striking & grappling) will all be challenging Angela for her Championship Belt, and as far as Stamp & Xiong versus Angela goes, it's 50-50 odds. All 3 are overall (both striking & grappling considered) approximately equally good (but not quite yet UFC Champion Valentina Shevchenko great).
Both Stamp & Xiong (together with up-and-coming Jap girl fighters Ayaka Miura & Itsuki Hirata, both impressively well-balanced in striking & grappling) will all be challenging Angela for her Championship Belt, and as far as Stamp & Xiong versus Angela goes, it's 50-50 odds. All 3 are overall (both striking & grappling considered) approximately equally good (but not quite yet UFC Champion Valentina Shevchenko great).