9Aplus - The EC120
can take off with 5 POB hot & high, it just can't do it with a full tank...and neither can the SW-4 or most light singles.
Comparing the RFMs, with 5 POB @ 180 lb each, and with 500 lb of fuel
(a generic figure, not meant to favor either platform), the SW-4 has a TOW of 3,612 lb
(using an older brochure, since the SW-4 RFM doesn't actually provide an OEW), while the EC120 has a TOW of 3,591 lb. Using these weights:
At 15C OAT: the SW-4 has a HOGE of 3,935 ft and a HIGE of 7,105 ft. The EC120 has a HOGE of 6,300 ft and a HIGE of 7,375 ft.
At 35C OAT: the SW-4 has a temp-limited HOGE of 2,575 ft @ 34C (35C is not achievable), and a temp-limited HIGE of 0 ft @ 33C. The EC120 has a HOGE @ 35C of 2,225 ft and a HIGE of 3,400 ft.
So I really wouldn't consider the SW-4 to be a better hot & high machine. From a technical perspective, I sincerely doubt the SW-4 seriously challenges the EC120 (rotor design, powerplant, avionics, safety, etc.). The SW-4 has its place in the market, but just not at this price point.
(But I agree that the EC120 could do with more power to fully exploit its abilities - it's a bit of a tease to give us such a large cabin and baggage compartment, and then not allow us to fully utilize it in all operating conditions.)
I/C