Which is best for you depends on:
(a) what you are doing,
(b) what you want to achieve, and
(c) your priorities & goals.
The main difference is design.
Architectural Technologists are trained to prepare construction drawings.
Architects are trained to design & plan buildings as well as to prepare construction drawings.
Although Technologists do receive a little design training, the main emphasis of schooling is on the technical aspects of building - construction materials & methods, building codes, AutoCAD, permit drawings, specifications, processes, and so on.
Architects are specifically trained to consider all relevant factors for a building with the goal to create the best possible design that suits the owners needs & goals while also fitting & working with the specific building site.
In designing, Architects consider function, aesthetics, three-dimensional form, rooflines, sun position, views, use of materials, use of space, furniture placement, privacy, comfort, convenience - and many other factors.
If you do not desire ANY help with design and instead only want drawings for a building permit, a Technologist is the way to go.
If instead you do want help with design, then an Architect is definitely worth considering.
Architectural Technologist - a great fit / choice if:
∙ you don't want any design help (or very minimal)
∙ the only thing you want are the technical drawings to get a building permit (construction drawings)
∙ you do not want feedback or suggestions for other possibilities
∙ you want a minimal monetary investment in your drawings
An Architect - worth considering if:
∙ you want help with your design
∙ you want to ensure that nothing crucial is overlooked
∙ the best use-of-space, function, & aesthetics are important to you
∙ it's important to you that everything comes together cohesively
∙ you want your layout to be based on sunlight, views, privacy, comfort, & convenience
∙ you want to take full advantage of & integrate with your site
∙ your spaces & rooms have nice proportions, & are appropriately sized for your furniture
∙ you appreciate big-picture thinking and thoughtful design
∙ you desire creativity
∙ you are particular
Unfortunately it is common for people to refer to ANYONE that draws as being an 'ARCHITECT'; which is obviously not the case. If it's an architect that you want, make sure they actually are.