It's tough, but club just shades it mainly because realistically Tottenham aren't gonna win the Champions League anytime so it would be great to see it happen. If I supported Chelsea, Arsenal, Man Utd or Liverpool I would probably say country because those teams are consistently in Europe and fighting for trophies with them being very likely to win something in the near future.
On the other hand, for England to win the World Cup or even European Championships would be great. The whole nation will be partying and I like it when supporters of rival teams such as Spurs and Arsenal get together to support England, putting club differences aside for that time.
Club just shades it though.