It all depends on what matters most to you in a resort and what level of "maintenance" you require in order to be comfortable. When staying on property my family has only ever stayed in deluxe resorts, but this past week I tried out values for the first time and stayed in standard rooms at both Cabana Bay Beach Resort and Disney's Pop Century. As someone who values cleanliness and customer service above all I would pick Pop over CBBR any day.
The one thing CBBR had over Pop was that the buses were faster and better timed when it came to getting from the resort to the parks. Like clockwork, the buses to/from CBBR and CityWalk came every 20 minutes and the ride lasted about 6 minutes. I also enjoyed eating at Citywalk's Toothsome and Cowfish. That's where the bonus points for CBBR end.
In order to get to/from the airport, Disney gives you magical express for free but Universal asks you to pay for Super Star Shuttle and the problem with that (aside from paying extra money) is that it's disorganized. You have to book Super Star Shuttle through Universal but the hotels are run by Loewes which means that any issue or delay has the front desk shoo you away to the Universal desk unless it's closed meaning you have to call the 24hr number or wait. The problems can continue if the Universal desk doesn't have all it's paperwork together (which happens) so you then have to call the SuperStarShuttle people directly to double check. This is part of why the line at the Universal desk is always so long. None of the employees seem to care that this is inconvenient and poor customer service. Universal and Loewes employees are polite but they don't care. Disney doesn't give you the runaround and their cast members are more professional.
The higher maintenance you are, the less CBBR will work for you. It had small pieces of trash in the hallways, scuffed up/banged up hallway walls, and a stale smell in the hallways. The beds creaked, the furniture was chipped, there were small mold spots on the cieling, the sheets were thin and blankets had pulls. I have never seen anything like this at a Disney hotel. Pop wasn't as ritzy as my favorites Animal Kingdom Lodge or the Polynesian but it looked and felt clean so I could stay there again. If you're staying at Universal I suggest you stay at one of their premium hotels so you can use their ferry boats, get included Express Passes and hopefully experience better cleanliness and service.
In terms of general preference, Citywalk's vibe is more of a bright, edgy nightlife scene whereas Disney Springs has more of a relaxing posh atmosphere. There are more restaurants and high-end stores in Disney Springs and the food is fantastic from Morimoto Asia and Homecomin' to Wine Bar George.