In terms of numbers Sesko’s numbers are no match for Gyokeres, this comparison has been a major issue in the Gunners decision making but the Gunners have now made their choice since Sesko seems unrealistic because of the price Leipzig are demanding. The last time I heard about the deal we were told talks have advanced so soon we hope for “here we go!” from Fabrizio.
They're both good attackers but if I were to pick one for my team, I think I'll go with Gyokeres, asides the fact that he's worked with Amorim before I think he's better than Sesko cause his goals in the past 2 season is more better than Sesko's. The Gunners should be glad that Gyokeres is given to them for a fair price so they shouldn't miss the opportunity else they'll regret not signing him. We'll I believe they'll cause from the look of things a deal is close to happening, as for getting both Gyokeres and Sesko I don't think it would be possible, maybe they could try going for Sesko next season but their major focus concerning that position should be Gyokeres since he's cheaper.
Sporting CP reportedly demanded a large portion of the transfer fee for Gyokeres be paid upfront, making negotiations difficult for Arsenal. Gyokeres himself is very keen on a move to the Premier League, but with the complexity of the transfer talks, his move to Arsenal might fall through.
Gyokeres experience suggests he's certainly better than Sesko, so it makes sense for Arteta to pursue him. Regardless of the situation, Arsenal must secure a striker for next season, they will struggle to compete if they fail to secure one.