This is how the Gatwick schedule for Wizz looks like for next summer in June and July, and where a route overlaps at both LTN and LGW, have compared the frequencies.
Austria
Vienna - Daily *
Bulgaria
Sofia - Daily (3x Daily @LTN)
Cyprus
Larnaca - Daily (Daily @LTN)
Greece
Athens - Daily *
Chania (Crete) - 4x Weekly
Mykonos - 4x Weekly
Hungary
Budapest - Daily (3x Daily @LTN)
Israel
Tel Aviv - Daily (5x Weekly @LTN)
Italy
Bari - 2x Weekly *
Catania (Sicily) - 3x Weekly *
Milan MXP - Daily *
Naples - 4x Weekly *
Rome FCO - Daily *
Montenegro
Podgorica - 4x Weekly
Poland
Krakow - Daily (2x Daily @LTN)
Portugal
Faro - Daily *
Madeira - 2x Weekly
Romania
Bucharest OTP - Daily (3x Daily @LTN & Daily @SEN)
Spain
Malaga - 2x Daily (Daily @LTN)
Lanzorote - 3x Weekly *
Palma de Mallorca - Daily (Daily @LTN)
Tenerife - 5x Weekly (5x Weekly @LTN)
* = Routes moved from Luton