The City of Budapest is diverse by nature. Buda is the smaller, old town like part with hilly terrain and lots of bumpy roads. Pest is the capital of fun, culture and night life. Not to mention Margaret Island which is just in between the two both in location and attributes.
This is exactly why the city can be discovered in multiple ways on multiple means of transportation
Here are two of the most sought after ones and their advantages.
Budapest Bike tour main advantages:
The perfect way to get to places that are less accessible
Ideal to navigate around with even in rush hour
If you opt for city bike rental, there are several drop off and pick up points
Great for fitness
Independence
Budapest River Cruise main advantages:
Wonderful view of the city
Endless possibilities (Budapest River cruise with: drinks, dinner, pizza, sightseeing, party etc.)
Convenient and relaxing
Unforgettable experience
Package deals (Budapest river cruise with Dinner and Cruise: Folklore and Operetta show)
In accordance with seasons: heated indoors, cooling wind on the top deck
Fit for families, friends and couples alike
No rush-hour
As it is clear from this comparison these two options are popular for a reason and cannot quite be considered similar. Therefore If I may make a suggestion, sign up for a Budapest River Cruise.