The phrase "a more efficient one" is correct and usable in written English.
It can be used when comparing the efficiency of two or more items, processes, or systems, indicating that one is superior in terms of efficiency.
Example: "After reviewing the options, we decided to implement a more efficient one to streamline our operations."
Alternatives: "a more effective option" or "a better-performing alternative".
Since XRP also relies on a blockchain technology (a more efficient one than bitcoin's, in fact), it would also provide a central clearing system.
One look at Microsoft's high profit margins certainly raises questions about how long this business model can continue before someone creates a more efficient one.
And for all the vagueries about the dynamics between north and south, a better connected country ought to be a more efficient one.
And, of course, a better informed market is a more efficient one, to all our benefit.
Our algorithm not only provides a more reliable wireless network, but also a more efficient one, which is thus able to satisfy users' demands.
After all, the Web made the music business a more efficient one, but the industry shrank in terms of revenues and profits.
ZappRX is a digital health company that helps medical specialists who treat complex conditions, specifically healthcare providers and specialty pharmacists, by providing them with a more efficient, one-stop-shop platform to manage specialty medications.
However, the replacement of an ancient obligate symbiont by a new more efficient one has been reported several times in insects (Conord et al. 2008; Koga et al. 2013; Oakeson et al. 2014).
The mailer and new website are meant primarily to temper worry in the neighborhoods near the museum about the effects of construction — and to argue that LACMA is not expanding but is instead replacing a group of aging buildings with a single, more efficient one.
Lighting retrofitting entails replacing an existing inefficient lamp with a new and more efficient one.
