What's The Difference Between These Two Chinese Bills?

The borders of China are populated by people who are ethnically Mongolian, Turkic, Tibetan, etc, and use their native script in everyday use. Having these languages on the bills helps people who may read Chinese as a second or third language.

https://en.m.wikipedia.org/wiki/Renminbi

Section "Use in Minority Regions"

1 Jiao is 1/10th of a Yuan.

My experience in China is the jiao denominations (there are notes and coins) are mainly traded in chain stores where small % seem to mean something important to corporate number crunchers. Essentially the prices include these very small denominations, and one is likely to end up with some as packet change when checking out. Normal street/market trading doesn't usually bother with them, even very low value street commerce doesn't care for them. It you go into the homes of people, it is not uncommon to find accumulations of these in a desk drawer or jars as they are annoying to carry around, but not enough value to go to the hassle or re-using. I honestly have found more use out of 1 cent coins in the US than jiao denominations in China. That being said, the jiao notes are rather attractive IMO, and featuring the ethnic people is a lot nicer than having Chairman Mao staring back.

The 1 jiao note is from the 1980 series. The 1 jiao and 5 jiao are still used and there are not series beyond that for these two.
The 1 Yuan is from the 1999 series. All the notes 1 yuan up have the 1999 series still in circulation. The 5 yuan up also have the 2005 series which is essentially the same note with more security features and now the 100 yuan note has a new 2015 one, again the same with more security features. It looks like the banknotes won't change for a long time.
Coins haven't changed since 1999 either. The notes and coins are of a low value (1 yuan is the largest coin and 100 yuan the largest note) probably because forgery is a massive business in China. I saw a fake 50 yuan note yesterday.