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The league playoff in the Plus league this season will be played by only four first-placed teams, following the system used in the Champions League. So, a 3-0 win or 3-1 would bring three, 3-2 two, and losing 2-3 one point, and the total result from two games will give the finalists. In case it's evened out, a golden set will be played. So, every won/lost will matter, and no doubt both teams will give 120%.
Jastrzebski coming to the Top 4 is a surprise for many, but they did make a great team with Kamp, Hidalgo, Muzaj, and recently they hired the German Schwartz. Actually, they came back to where they belong after two bad seasons where they were focused more on patching up things financially. ZAKSA will be defending the title as the "one", but they have right to be afraid of Jastrzebski. The coach De Giorgi still can't use the injured Tilie, which is a handicap because Buszek is not on the same level as he is.
Jastrzebski and ZAKSA played three official and one friendly game this season, and every one ended with high numbers:

- the friendly one (neutral court),
Sep 15th 2016, Jastrzebski - ZAKSA 1-3 (22-25, 28-30, 25-23, 20-25)

Plus league

Oct 29th 2016 ZAKSA - Jastrzebski 3-2 (25-21, 20-25, 25-16, 25-27, 22-20; with Tilie playing)

Feb 10th 2017 Jastrzebski - ZAKSA 2-3 (25-23, 25-23, 19-25, 18-25, 11-15; without Tilie)

Polish Cup (semifinal, neutral court)
Jan 14th 2017 ZAKSA - Jastrzebski 3-1 (25-23, 23-25, 27-25, 25-20)

So, 226, 209 and 193 points in the official games, and 198 points in the friendly one. Exactly half of the sets played (9/18) were won thanks to the difference in points, and that shows that the difference between these two teams is not big. Add to these numbers the games these two teams played against the other semifinalists (SKRA and Resovia), Jastrzebski had 181 points against Resovia twice, ZAKSA 205 and 137 in the last game that was irrelevant. With SKRA the same thing, ZAKSA 3/3 (199 in four sets, 204 and 196 points), Jastrzebski 2/2 (207 and 214 points), that is 8/9 times over this margin, with the only under being in the game that was irrelevant.
All those numbers can definitely not be ignored, and the system of the competition in the semifinal makes sure this will be another game with high numbers, and the margin that was set doesn't correspond neither to the statistic nor the quality of these teams.