Is the Civic 1.5T better than the 2.0?
Not universally. The 1.5T usually feels stronger and easier at highway pace, but the 2.0 is simpler and often the easier long-term ownership choice if you care more about straightforward maintenance than extra torque.
Do the 1.5T and 2.0 share the same common problems?
Some overlap is real around suspension noise, brakes, and general Civic X ownership, but ignition, turbo-related drivability, and parts-shopping logic do not transfer perfectly between them.
Can I use the same parts guides for both engines?
Only sometimes. Brake and chassis advice can overlap, but engine, ignition, intake, and some maintenance parts need to be checked by exact powertrain and trim.