Over on Saturn where the W70 Series 3 had a lot of light scatter around planet, the series 4 was equal to the Delos with minimal haze around planet.
Back to Jupiter they again looked about the same but noticed Delos had a very white Jupiter and the W70-4 was a little more earthy tones to the planet. They both showed the fine details equally.
Got the series 4 from Telescopes Canada in one week to USA for $230. If you don't wanna spend almost $400 for the Delos, Antares has a fine alternative.