IQ from this zoom looks a lot better, thought f16 against the sun does provide annoying flare and lot more PF, but still in cleanable amount. Also the starbursts are not controlled as well:
But wide open close up is much better:
This might also be wide open. Can't remember anymore. Same to focal lengths. I believe previous was at 150mm and this close to 75mm, but can't be sure.
At f5.6 and focused somewhere in the middle provide great IQ and nice separation.
As a lens this looks more promising, but I rather use primes, so also this shall wait the SIC month on the shelf.