Hi Xavi, I haven’t looked into this exact problem too much but when I don’t confidently know the manufacture then I’m likely to use the Conservative values from EC3 or the 80th percentile values from One Click (if the material isn’t in EC3). The following compare CLT (25 EPDs) and 35MPa concrete (7861 EPDs!) in EC3. You can see that EC3 is suggesting that most CLT products have a lower EC than concrete, even though you can get intensive CLT products and less intensive concrete products.
This is an aside from your question but CLT and concrete structures won’t be designed to have the same spans so this should be taken into account, just so you’re not considering 7-ply CLT if that isn’t applicable. Similarly, the weight of a CLT building will reduce foundation loads, which you may consider depending on how in-depth this comparison gets, but it is worth acknowledging.
Another study that may be useful is this … SE2050 EC Intensity Diagrams
It shows that CLT floor plates are typically lower than PT concrete alternatives but there can be some cross over, which is what Justin was saying too.