List of common dependencies already in the project vs the one's that will be brought by spring boot v 2.5.0:
(The resolved versions by default are also mentioned)

assertj-core: 3.18.1
byte-buddy: 1.10.21 from spring over 1.10.14
guava: 30.1.1-jre
jackson-annotations: 2.12.3
jackson-core: 2.12.3
jackson-databind: 2.12.3
jakarta-activation-api: 1.2.1 over 1.2.2 from spring
jakarta-annotation-api: 1.3.5
jakarta-validation-api: 2.0.2
jakarta.xml.bind-api: 2.3.3 from spring over 2.3.2
javassist: 3.25.0-GA over 3.27.0-GA from spring
jaxb-runtime: 2.3.1
kotlin-stdlib: 1.3.20 over 1.5.0 from spring
logback-classic: 1.2.3
mockito-core:3.7.7
reflections: 0.9.11
simpleclient: 0.11.0 over 0.10.0 from spring
simpleclient_common: 0.10.0  from spring over 0.11.0
slf4j-api: 1.7.30
snakeyaml: 1.27
swagger-annotations: 1.6.2 over 1.5.20 from spring
swagger-models: 1.6.2

If spring boot v 2.5.6 is used, then the above common dependecies are slightly changed. Only the updates are mentioned below:

byte-buddy: 1.10.22 from spring over 1.10.14
guava dependency removed from spring
jackson-annotations: 2.12.3 over 2.12.5 from spring
kotlin-stdlib dependency removed from spring
reflections dependency removed from spring

Note that the above common dependecies were identified by adding the below spring related dependencies to PAP repository:

         <!-- Spring framework -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-validation</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-security</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-mongodb</artifactId>
            <version>${version.springboot}</version>
        </dependency> 
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
            <version>${version.springboot}</version>
        </dependency>
        <dependency>
            <groupId>org.mariadb.jdbc</groupId>
            <artifactId>mariadb-java-client</artifactId>
            <scope>runtime</scope>
        </dependency> 
        <dependency>
           <groupId>org.springframework.boot</groupId>
           <artifactId>spring-boot-starter-actuator</artifactId>
           <version>${version.springboot}</version>
        </dependency>
        <dependency>
            <groupId>io.micrometer</groupId>
            <artifactId>micrometer-registry-prometheus</artifactId>
            <version>${version.io.micrometer}</version>
        </dependency>
        <dependency>
           <groupId>io.springfox</groupId>
           <artifactId>springfox-swagger2</artifactId>
        </dependency>
        <dependency>
           <groupId>io.springfox</groupId>
           <artifactId>springfox-swagger-ui</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>