This is a fair question to ponder, as Ubiq is forked off Ethereum. While that may certainly be true, there other considerations to account for when it comes to Ubiq and Ethereum, and ultimately, comparing the two side-by-side may not be the best way to decide which is ahead of the other. It depends on what your goal is.
If regular implementation of new features is your concern, than Ethereum is ahead of Ubiq on this instance. Ubiq, only integrates the most secure and stable features of Ethereum, taking fewer risks, and slowing down development time. Ethereum, on the other hand, is much more innovative in its approach, although potentially more prone to bugs or other issues.
On the flip side, if you need a cryptocurrency that is stable, secure, and reliable, then Ubiq would be ahead in this case.
If you are looking to mine, Ubiq is ahead of Ethereum on mining potential. The Flux difficulty algorithm used by Ubiq allows the network of Ubiq nodes to operate at lower and more varied hashrates. In addition, Ubiq has a much smaller DAG size than Ethereum. These things make it possible to use older hardware, such as GPUs with at least 2GB of memory, to mine effectively for another several years.
To mine Ethereum, you have to have a much more capable setup which requires a much higher initial investment.
Ubiq’s smaller DAG size compared to Ethereum’s means that it has much more mining potential, and wallets will sync faster with it. However it also means that fewer blocks are added to Ubiq over a period of time. For new nodes being set up, this also slows down the initial sync.
Ethereum has been around longer, but Ubiq’s development team has had the advantage of learning from Ethereum’s mistakes and taking more consideration into its development. Ubiq also has a more stable inflation rate, and a set coin distribution rate. The value of Ubiq is expected to be less subject to fluctuations. Since Ubiq aims to work more in corporate applications, this is an advantage and certainly where Ubiq can be considered ahead of Ethereum.
Ethereum has already established itself in the crypto world, but Ubiq is also making a name for itself. Many will find Ubiq’s stability, reliability, and mining potential as factors that make it ahead of Ethereum, or even see it as an improvement. For corporate or real-world applications, this is a huge advantage.
If you are a trader, you might want a coin that involves more risk with better potential reward. Ethereum’s value has increased at a much more rapid pace than Ubiq’s with a 3500% gain in the first half of 2017.
Ultimately, which coin wins this match up is subjective, depending on your goals, what features you prioritize, and how you intend to use it.