WPF will add roughly one weapon speed for every additional 20 to 25 wpf.
a 200 wpf 1h with 95 speed will have nearly the same speed as a 100 wpf weapon with 100 speed.
Also, the 200 wpf weapon will amount to almost 2 PS more damage than the latter. Although, it isn't like you can get 200 wpf, i'm just making a point.
A real in-game example: a 150 wpf weapon with 95 speed compared to the same weapon with only 130 wpf
150 wpf will be roughly one weapon speed faster, and do about 2% more damage than the latter.
Just to put things in perspective.
I personally find that 1 less weapon speed from a 1h (something already fast) to potentially increase my pole-arm use by up to 4 weapon speed, when poles are a fairly lower speed weapon in general, to be a good trade.
It comes down to how often you use poles, and if that is a trade worth it to you! if you play by far mostly with 1h, then you are making the right decision.