Not sure if there is a simple answer to your question.
In general, ozone is considered by many oxygen therapy
experts as safer than H2O2. In principle, they have a
similar effect in that they both have an extra oxygen
atom (O3 vs. O2 for normal oxygen, and H2O2 (Hydrogen-Peroxid) vs. H2O
for normal water). But apparently the hydrogen aspect
of H2O2 (Hydrogen-Peroxid) has a burning effect not present in ozone.

So, based upon testimonies here and other material you
read, you'll have to make up your own mind as to which
route to take. H2O2 (Hydrogen-Peroxid) is obviously the less expensive
route. I've personally taken the ozone route (except I
do enjoy an occational H2O2 bath).

If you choose the ozone path, there are various things to
consider. There are various treatments such as drinking
ozonated water, ear, rectal (vaginal for women) insufflation,
ozone sauna, and even direct injection (which most people
would understandably never do in their home). Beyond
drinking ozone water, you would need a medical grade ozonator
which can be considerably more expensive then an inexpensive
water ozonator.

At face value, you could say that taking H2O2 orally is
roughly equivalent to drinking ozonated water (although
H2O2 may possibly be more potent because of the
concentration??? - not sure about this). Doing an ozone
rectal insufflation, in theroy, would roughly be equivalent
to perhaps an H2O2 enema of some sort.

Basically, I'm saying that you're probably comparing apples
to oranges when comparing H2O2 orally to ozone rectal
insufflation. I know that probably doesn't answer your
question, but hopefully sheds some light.

i followed the links provided by hanna below and found this:

Making and Using 3% Solutions of H202

A 3% solution can be made quite easily by first pouring 1 ounce of 35% H202 into a pint jar. To this add 11 ounces of distilled water. This will make 12 ounces of 3% H202. 3% H202 has a variety of medicinal uses.

Three tablespoons mixed with a quart of non-chlorinated water makes a good enema or douche formula.

It can be used full strength as a mouthwash or mixed with baking soda for toothpaste.

It can be used full strength as a foot bath for athlete´s foot. (Diabetics have found relief from circulation problems by soaking their feet in 1 pint of 3% peroxide mixed with 1 gallon of warm, non-chlorinated water for 30 minutes nightly.)

A tablespoon added to 1 cup of non-chlorinated water can be used as a nasal spray. Depending on the degree of sinus involvement, one will have to adjust the amount of peroxide used. I have seen some who can use it at the full 3% strength and others who had difficulty with using a few drops and mixed with a cup of water.

3% H202 can be added to pets drinking water at the rate of 1 ounce per quart of non-chlorinated water. Sick cattle reportedly benefit from 1 pint (of 3%) to each 5 gallons of water. (Chickens and cows have remained healthy by using 8 ounces of 35% H202 per 1,000 gallons of drinking water.)