Thank you for your question.
I can understand wanting to know which type is the easiest to use with your type of trimming.
The curved shaft is lighter and easier to handle.
Usually it has a smaller size CC engine 25CC to 28CC.
The straight shaft models are a little heavier and can have a little larger engine. Up to 32CC.
If you are trimming under a lot of shrubbery the straight reach makes it easier to get under those yard objects.
You could go with a combo unit that has a split boom and you can attach and curve or straight shaft as you wish.
You can also add a number of other attachments to the split boom models.
Split boom trimmer
With the split boom model you can get a blower/mini tiller/brush-cutter/edger/mini chainsaw pole trimmer.
I hope this will answer your question.
Thank you for using Manage My Life.