Thinking of switching network

Hi there I'm new to all this mobile broadband so hopefully someone can help so here goes.
Currently using a Nighthawk m1 with a onmi-directional antenna via both ts9 ports on 02 my speeds and such are terrible! Night times are amazing but I understand the congestion on the tower I'm connected to.
Currently daytime speeds are between 4-27mb with a ping of 70+.
I know 02 arnt the best for speeds on 4g my signal is on excellent and iv learnt how to understand the readings on signal strength my question is Vodafone is if anything the best for speed in the uk when it comes to 4g I'm sure VOXI is a third party of vodafone.
My question is would a voxi sim with unlimited data be better than 02 when it comes to speeds and gaming.
My m1 is being used as my home broadband.
I have plenty of towers around me that support the major cell networks.