I have had both. Both will do 80s metal with no boost required. Here is my take on both.
PT100: Made in USA by a great company with great support. Way better clean channel than the Cornford, actually better than most any amp on the market. Channel 2/3 are very much like a Marshall, more so than the Cornford, the Cornford is a bit darker than most Marshalls IMHO. Overall great amp with a lot of versatility with the whomp, feedback, etc on options.
Cornford: Plays like butter and has a lead tone to die for. It is smooth but a bit dark in the mids. Decent clean channel. However I have heard the support has been lacking since the fire and they are outside the US so support for a US customer is not going to be as good as Suhr. Actually Suhr has better support than almost anybody. See I am putting Suhr pros in the Cornford section.
PT100 would be my choice if I was picking from the two, but the Cornford is a bit more forgiving and easier to play. If you like the Splawn sound you will love the PT100, has that dry grind with the ability to do more with the mids and has more gain IMHO.
Just my .02