Here is the Jain-dharma related information I could find on Kirtiyashsuri and Shreyansprabhsuri.

1) Acharya Shri Kirtiyash Suri / Vijay Kirtiyashsuri

• He is described as a respected Jain monk and Acharya in the Shwetambar Murtipujak Tapagachchh tradition. ( jainqq.org)
• His birth name is given as Kantilal, born to Jiviben and Gagalbhai in Bhorol, Gujarat. He took diksha at a young age, around 13. ( jainqq.org)
• His father later became known as Acharya Gunayash Suriji, and the text says Gunayash Suriji was his guru and immediate predecessor in the line of succession. ( jainqq.org)
• He was trained under Acharya Shri Ramchandra Surishwarji Maharaja. ( jainqq.org)
• He is described as having wide knowledge of Jain architecture, literature, Agam, and rituals. ( jainqq.org)
• A separate Jain source describes him as a popular speaker, with many disciples and large audiences, though that source is older and less formal in style. ( en-academic.com)
• Jain-related publications linked to him include works such as Agamni Olakh, Panchashak Prakaranam, and Jain Sanghna Mobhione Margdarshan. ( jaingpt.org)

2) Acharya Dev Shri / Vijay Shreyansprabhsuri

• He appears in Jain book records as Acharya Dev Shri Shreyansprabhsuri or Vijay Shreyansprabhsuri Maharaj. ( jaingpt.org)
• He is listed as an author or editor in the Jain Ramayan series published by Smrutimandir Prakashan. ( jaingpt.org)
• In those records, he is connected with multiple volumes of the Jain Ramayan, including Part 03, Part 04, Part 06, and Part 07. ( jaingpt.org)
• The Jain Ramayan summaries describe the work as presenting the Jain perspective on Ramayana, emphasizing ahimsa, aparigraha, brahmacharya, karma, guru-bhakti, and Jain ethical ideals. ( jaingpt.org)
• Another Jain source lists “Prabhu Veer ke Dash Shravak” and “Prabhu Veer evam Upsarga” under Shreyansprabhsuri, showing his role as a Jain writer/teacher as well. ( jainfoundation.in)

3) In short

• Kirtiyashsuri is known more as a Jain Acharya and speaker with deep study in Jain scriptures and ritual tradition. ( jainqq.org)
• Shreyansprabhsuri is known more through Jain literary works and editorial/authorship, especially the Jain Ramayan series. ( jaingpt.org)

If you want, I can also give you:

• their guru-parampara / lineage, or
• a list of their known Jain books and works.