Telstra Group Ltd and Fortescue Ltd are both popular investments in Australia due to their blue-chip status and dividends. Telstra, the leading telecommunications company, focuses on growth areas like 5G and cybersecurity, with rising core earnings and subscriber numbers. On the other hand, Fortescue, one of the world's largest iron ore miners, is affected by the unpredictability of the iron ore market but is investing in green energy projects such as green hydrogen and green ammonia. Despite this, Fortescue recently announced job cuts and a delay in its green hydrogen production goal for 2030. When comparing dividend yields, Fortescue offers higher yields at 9.2% and 6.6% for FY25 and FY26, while Telstra offers 7% and 7.4% for the same period. In terms of valuation, Telstra's share price is valued at under 21x FY25's estimated earnings and under 19x FY26's estimated earnings, showing a positive trend in profit. Fortescue, with a focus on green energy, has a lower valuation at 10x FY25's estimated earnings and 11x FY26's estimated earnings. The article suggests that Telstra could be a better medium-term investment due to its rising core earnings, while Fortescue might be a contrarian opportunity if the iron ore price falls further.