For a load shortened antenna? No, I don't think it makes all that much difference; efficiency will be poor at 80/40m no matter what. Here's my Comet CHV-5X (a load shortened dipole) at 40m... as you can see the bandwidth is crazy narrow, and while a tuner can present a palatable load to the transmitter (BTW an IC-7300 also) the resulting radiation is still QRP territory. From a 100W transmitter! It actually works quite okay on 20m, where the the significantly increased bandwidth, impedance, and efficiency more than makes up for the slightly poorer propagation. BTW, the 40m band, with carefully trimmed radials (I measured 1mm to equal 25kHz of resonance shift) peaks in our Extra license portion of the band, so just a General license wouldn't even permit using it at peak efficiency! And shifting the resonance actually warps the impedance, so there's really only one good trim frequency.
No matter how well made the antenna is, it just can't overcome the physical limitations resulting from shortening it. Mechanically I'm sure the R&S gear is excellent!
(http://www.rockgarden.net/download/antenna/40m-final-50.png)