Your dreams would be even wetter if you knew the flow rate (I mean the fuel flow rate) at the speeds quoted in the advertising material
And the oxygen flow rate, too, at the altitudes at which those figures are obtained...
Physics is physics and always will be. Mooneys are more efficient due to the smaller cross-sectional area of the cockpit. At comparable fractions of the respective engine max rated powers, a TB20 (a 1970s metal design) does exactly the same MPG as an SR22 or a Cessna/Columbia 400; the latter two seemingly being slippery airframes which chuck away the
entire advantage (over a 1970s hull covered in rivets) by having fixed gear (but the salesmen won't ever admit that, claiming their fixed gear costs only 1 or 2 kt).
Today, the logical choice for a new buy would be an SR22. There isn't much else out there. The Cessna 400 is another one. But, with the one-piece avionics which cannot be touched by anybody except an authorised dealer, be prepared for regular trips to the same place.