Guardiola, who has not tasted European success since 2011, said what sets the Champions League apart is the level of the opposition.
Guardiola's side capped an incredible campaign in fittingly dynamic fashion as Watford were put to the sword by Raheem Sterling and Gabriel Jesus.
Raheem Sterling and Gabriel Jesus each scored twice, while David Silva and Kevin de Bruyne netted to cap a glorious campaign with the biggest margin of victory in a FA Cup final since 1903.
Guardiola wants reinforcements this summer to refresh his squad, but also to try to remain a step ahead
The City manager believes that they are well placed to make an even more powerful run next season.
City could make history by becoming the first side to ever win the English domestic treble but have had to grind it out in recent weeks.
Guardiola and Klopp are locked in a battle for the Premier League title that will be settled in the final matches of the season on Sunday.
For the first since 1972, when Cruyff was starring on the field, Ajax are on course for a historic treble.
City have now won 13 consecutive league games to overhaul a seven-point deficit at the top of the table in January
Manchester City and Liverpool are battling it out for the Premier League title
Liverpool must travel to Newcastle next weekend, either side of the two legs of their Champions League semi-final against Barcelona, before hosting Wolves on May 12th.
Liverpool could finish with the third-highest tally in the Premier League era and still fail to end their 29-year wait for the League title.
Bernardo Silva and Phil Foden have made giant strides, to such an extent that the thought of David Silva being phased out of the City team isn't accompanied with so much trepidation anymore.
City boast an impressive run of five wins and a draw in their last seven league visits to Old Trafford
Pep Guardiola will target the quadruple again next season with Manchester City despite the disappointment of this week's Champions League exit against Tottenham.