Short answer, if a 140RX worked fine, the SAP will work fine too. If the 140RX was not enough, the SAP may not be enough either but it would depend. The SAP puts out more power than the RX but needs to turn higher rpm to develop its torque. Just stretching the pipe does not get the same result as it does with glow.
The Smaragd would be fine with the SAP180. The RX handled these just fine. The Partner is probably a little on the large side for the SAP180 and might not be as good of a match.