Original sentence: Garden railways, in smaller scales (that cannot pull a "live" person nor be ridden on), offer the benefits of real steam engines (and at lower cost and in less space), but do not provide the same experience as operating one's own locomotive in the larger scales and riding on (or behind) it, while doing so
Edited sentence: Garden railways, in smaller scales (that cannot pull a "live" person nor be ridden on), offer the excitement of real steam engines (and at lower cost and in less space), but do not provide the same thrill as operating one's own locomotive in the larger scales and riding on (or behind) it, while doing so