Yes, they are both Caladium 'Kathleen'!
The one on the left I purchased this year, it has freshly sprouted as they got planted late, the one on the right is from 4 years ago.
The looks of plants can vary by their growing conditions, I know, but how amazingly different these look!
I believe that the new will eventually start looking like the old one..

I would have thought they were different! They're both very beautiful though

I also love both Ibis, that is a plus-point!

They both look good. I've noticed the same thing with some of my older caladiums, don't look like they did the first year.

In the winter before last I took one of my Kathleen bulbs as a gift to my Brazilian friends who generously offered me and my friend a stay in their house.
To my surprise, the plant seemed to revert to how it looked like originally. Still not quite the same though as the newly sprouted one,
I think it proves that the climate really has a big influence on the appearance.
The rainforest climate, warm and very humid, I suppose must be very similar to the area in Florida where they are being grown.
After all Caladium bicolor are native to Brazil and I did meet them once in a while on my walks in the forest.
The Belgian summers are very whimsical, the temperature can fall or rise considerably in just one day, humidity levels also being very variable not consistent.

Kathleen in the misty rainforest:

Good point, Myriam. I know I've seen that with other tropicals, like bromeliads, where the growing conditions definitely affect the color. Plants are so adaptable!

hi i live in north west uk i have a covered hot area for our hot tub high humidy getting caladium from uk supplier next spring whats the lowest temp you can grow at day and night already have lots of cane begonia and rex's and impatiens parrot plant etc very much into tropical plants from all over the world

I find the colors on these most influenced by exposure in my climate (ridiculously humid summers, 90+ every day.) More shade = more intense color.