Originally Posted by
Turkalurk85
My clan has 1 TH10 with inferno towers that wars with us about 50% of the time and both him and I went to TH10 about the same time. We have several near max TH9 defense base, most have heroes combined 20-35, and have started lego walls. Before the two of us upgraded TH to 10, we were constantly matched with rushed TH10s, sometimes would face clans with 8-10 bases with inferno while we had 0. After the upgrade, he built inferno and I did not. I haven't noticed any significant difference in the war matchups as we were getting matched with TH10s before because of the high weight of our TH9 bases. Pre-TH10 upgrade I was ranked 3-4 on the defensive map, post TH10 upgrade with TH10 offense I am the same ranking.
I'm in about the same position as you regarding base upgrades but behind on walls. I have left cannons and mortars at TH8 level because I don't see the additional benefit of their upgrade vs dumping that gold into walls. My thoughts are to upgrade defenses that stop 3 star attacks and cannons are ground only. I've been happier having lava walls in front of my AQ to slow down cb/shattered attacks. In the end, it might depend on your clan and what you enjoy. We won 90% of our wars before I did this and still do, so is there really a difference?