Who would people prefer as their number 9 between those two? I'm just happy we had them both at Bayern, both are complete strikers.
I wouldnt say they're both "complete" strikers, because they've been deployed differently and have been asked to do different things in their careers.
Harry Kane at Tottenham, and early during the season with Bayern, loves to drop deep and play balls forward to his wingers. Lewandowski never did that at Bayern because he played with Thomas Muller in his prime. Lewandowski had 1 job at Bayern and it was scoring goals. I also think Lewandowski was more athletic and ran/pressed harder than Kane. How hard guys like Lewandowski, Muller, Coman, Perisic, and Gnabry pressed was a big reason those Bayern teams under Flick won every competition possible.
It would be interesting to see how Kane would have adapted playing with prime Muller.
Both are world class players and will be remembered amongst the best at their position during their era, but I'd take prime Lewandowski over Harry Kane. I also think some of that depends on your system and surrounding talent.
If you took Lewandowski, Kane, Benzema, and Suarez and asked 10 fans to rank them, you'd probably have 7 or 8 different orders.