Knowing both locations very well, the best location of the two is Acton Bridge during day time. During the week, you should get DRS intermodal's, DB liners, GBRf Biomass as well as depending on the day GBRf cement, NR train, DB e/stone hoppers to and from Warrington direction with mainly F/L binliners and liners, DB Cargo 'Aluminium' to and from Runcorn direction with the odd morning 'tanktainer' train to and from Folly Lane. Currently the DRS 'auto' is not operating to/from Garston. If you are visiting on a Saturday, traffic will not be much different with the odd exception.
As for traffic from the to / from Chester direction for WBQ, it really depends on what day and only likely to be a DB Cargo e/sand train or a GBRf stone train from Penmaenmawr. Nothing to miss at WOJn as the main train is the DB cargo e/stone train which you would see at Acton Bridge.
As for the so called report of local resident being annoyed by enthusiast's at Acton Bridge, just ignore it - it was mainly during the Covid period and simply do not park in front of the nearby houses, therefore avoid any issue. That same resident probably be annoyed by the passing trains!!
