To be honest, if you're doing a lot of running you should be in running shoes, doing a lot of hiking you should be in hiking shoes.
Trying to compromise with one pair of footwear for everything is just that - a compromise.
Six months hard use in the bush is a test for any footwear, so I would advise you to take the tabbing boots if they suit you; but also take sandals (for other activities and to air your feet) and also some lightweight runners if you plan to run a lot. This also gives you spare footwear in the event of any 'wardrobe malfunctions'
In practice, there is not much difference between the tabbing and the sneekers. I'd advise trying both pairs on before you buy them, when you find the pair that fits they are like slippers and you'll want all your footwear to be handmade in Yorkshire!